1VERSION = 4 2PATCHLEVEL = 12 3SUBLEVEL = 0 4EXTRAVERSION = -rc2 5NAME = Fearless Coyote 6 7# *DOCUMENTATION* 8# To see a list of typical targets execute "make help" 9# More info can be located in ./README 10# Comments in this file are targeted only to the developer, do not 11# expect to learn how to build the kernel reading this file. 12 13# o Do not use make's built-in rules and variables 14# (this increases performance and avoids hard-to-debug behaviour); 15# o Look for make include files relative to root of kernel src 16MAKEFLAGS += -rR --include-dir=$(CURDIR) 17 18# Avoid funny character set dependencies 19unexport LC_ALL 20LC_COLLATE=C 21LC_NUMERIC=C 22export LC_COLLATE LC_NUMERIC 23 24# Avoid interference with shell env settings 25unexport GREP_OPTIONS 26 27# We are using a recursive build, so we need to do a little thinking 28# to get the ordering right. 29# 30# Most importantly: sub-Makefiles should only ever modify files in 31# their own directory. If in some directory we have a dependency on 32# a file in another dir (which doesn't happen often, but it's often 33# unavoidable when linking the built-in.o targets which finally 34# turn into vmlinux), we will call a sub make in that other dir, and 35# after that we are sure that everything which is in that other dir 36# is now up to date. 37# 38# The only cases where we need to modify files which have global 39# effects are thus separated out and done before the recursive 40# descending is started. They are now explicitly listed as the 41# prepare rule. 42 43# Beautify output 44# --------------------------------------------------------------------------- 45# 46# Normally, we echo the whole command before executing it. By making 47# that echo $($(quiet)$(cmd)), we now have the possibility to set 48# $(quiet) to choose other forms of output instead, e.g. 49# 50# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 51# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 52# 53# If $(quiet) is empty, the whole command will be printed. 54# If it is set to "quiet_", only the short version will be printed. 55# If it is set to "silent_", nothing will be printed at all, since 56# the variable $(silent_cmd_cc_o_c) doesn't exist. 57# 58# A simple variant is to prefix commands with $(Q) - that's useful 59# for commands that shall be hidden in non-verbose mode. 60# 61# $(Q)ln $@ :< 62# 63# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 64# If KBUILD_VERBOSE equals 1 then the above command is displayed. 65# 66# To put more focus on warnings, be less verbose as default 67# Use 'make V=1' to see the full commands 68 69ifeq ("$(origin V)", "command line") 70 KBUILD_VERBOSE = $(V) 71endif 72ifndef KBUILD_VERBOSE 73 KBUILD_VERBOSE = 0 74endif 75 76ifeq ($(KBUILD_VERBOSE),1) 77 quiet = 78 Q = 79else 80 quiet=quiet_ 81 Q = @ 82endif 83 84# If the user is running make -s (silent mode), suppress echoing of 85# commands 86 87ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 88 quiet=silent_ 89 tools_silent=s 90endif 91 92export quiet Q KBUILD_VERBOSE 93 94# kbuild supports saving output files in a separate directory. 95# To locate output files in a separate directory two syntaxes are supported. 96# In both cases the working directory must be the root of the kernel src. 97# 1) O= 98# Use "make O=dir/to/store/output/files/" 99# 100# 2) Set KBUILD_OUTPUT 101# Set the environment variable KBUILD_OUTPUT to point to the directory 102# where the output files shall be placed. 103# export KBUILD_OUTPUT=dir/to/store/output/files/ 104# make 105# 106# The O= assignment takes precedence over the KBUILD_OUTPUT environment 107# variable. 108 109# KBUILD_SRC is set on invocation of make in OBJ directory 110# KBUILD_SRC is not intended to be used by the regular user (for now) 111ifeq ($(KBUILD_SRC),) 112 113# OK, Make called in directory where kernel src resides 114# Do we want to locate output files in a separate directory? 115ifeq ("$(origin O)", "command line") 116 KBUILD_OUTPUT := $(O) 117endif 118 119# That's our default target when none is given on the command line 120PHONY := _all 121_all: 122 123# Cancel implicit rules on top Makefile 124$(CURDIR)/Makefile Makefile: ; 125 126ifneq ($(words $(subst :, ,$(CURDIR))), 1) 127 $(error main directory cannot contain spaces nor colons) 128endif 129 130ifneq ($(KBUILD_OUTPUT),) 131# Invoke a second make in the output directory, passing relevant variables 132# check that the output directory actually exists 133saved-output := $(KBUILD_OUTPUT) 134KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 135 && /bin/pwd) 136$(if $(KBUILD_OUTPUT),, \ 137 $(error failed to create output directory "$(saved-output)")) 138 139PHONY += $(MAKECMDGOALS) sub-make 140 141$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 142 @: 143 144sub-make: 145 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ 146 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 147 148# Leave processing to above invocation of make 149skip-makefile := 1 150endif # ifneq ($(KBUILD_OUTPUT),) 151endif # ifeq ($(KBUILD_SRC),) 152 153# We process the rest of the Makefile if this is the final invocation of make 154ifeq ($(skip-makefile),) 155 156# Do not print "Entering directory ...", 157# but we want to display it when entering to the output directory 158# so that IDEs/editors are able to understand relative filenames. 159MAKEFLAGS += --no-print-directory 160 161# Call a source code checker (by default, "sparse") as part of the 162# C compilation. 163# 164# Use 'make C=1' to enable checking of only re-compiled files. 165# Use 'make C=2' to enable checking of *all* source files, regardless 166# of whether they are re-compiled or not. 167# 168# See the file "Documentation/dev-tools/sparse.rst" for more details, 169# including where to get the "sparse" utility. 170 171ifeq ("$(origin C)", "command line") 172 KBUILD_CHECKSRC = $(C) 173endif 174ifndef KBUILD_CHECKSRC 175 KBUILD_CHECKSRC = 0 176endif 177 178# Use make M=dir to specify directory of external module to build 179# Old syntax make ... SUBDIRS=$PWD is still supported 180# Setting the environment variable KBUILD_EXTMOD take precedence 181ifdef SUBDIRS 182 KBUILD_EXTMOD ?= $(SUBDIRS) 183endif 184 185ifeq ("$(origin M)", "command line") 186 KBUILD_EXTMOD := $(M) 187endif 188 189# If building an external module we do not care about the all: rule 190# but instead _all depend on modules 191PHONY += all 192ifeq ($(KBUILD_EXTMOD),) 193_all: all 194else 195_all: modules 196endif 197 198ifeq ($(KBUILD_SRC),) 199 # building in the source tree 200 srctree := . 201else 202 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 203 # building in a subdirectory of the source tree 204 srctree := .. 205 else 206 srctree := $(KBUILD_SRC) 207 endif 208endif 209objtree := . 210src := $(srctree) 211obj := $(objtree) 212 213VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 214 215export srctree objtree VPATH 216 217# SUBARCH tells the usermode build what the underlying arch is. That is set 218# first, and if a usermode build is happening, the "ARCH=um" on the command 219# line overrides the setting of ARCH below. If a native build is happening, 220# then ARCH is assigned, getting whatever value it gets normally, and 221# SUBARCH is subsequently ignored. 222 223SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ 224 -e s/sun4u/sparc64/ \ 225 -e s/arm.*/arm/ -e s/sa110/arm/ \ 226 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 227 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 228 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 229 230# Cross compiling and selecting different set of gcc/bin-utils 231# --------------------------------------------------------------------------- 232# 233# When performing cross compilation for other architectures ARCH shall be set 234# to the target architecture. (See arch/* for the possibilities). 235# ARCH can be set during invocation of make: 236# make ARCH=ia64 237# Another way is to have ARCH set in the environment. 238# The default ARCH is the host where make is executed. 239 240# CROSS_COMPILE specify the prefix used for all executables used 241# during compilation. Only gcc and related bin-utils executables 242# are prefixed with $(CROSS_COMPILE). 243# CROSS_COMPILE can be set on the command line 244# make CROSS_COMPILE=ia64-linux- 245# Alternatively CROSS_COMPILE can be set in the environment. 246# A third alternative is to store a setting in .config so that plain 247# "make" in the configured kernel build directory always uses that. 248# Default value for CROSS_COMPILE is not to prefix executables 249# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 250ARCH ?= $(SUBARCH) 251CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 252 253# Architecture as present in compile.h 254UTS_MACHINE := $(ARCH) 255SRCARCH := $(ARCH) 256 257# Additional ARCH settings for x86 258ifeq ($(ARCH),i386) 259 SRCARCH := x86 260endif 261ifeq ($(ARCH),x86_64) 262 SRCARCH := x86 263endif 264 265# Additional ARCH settings for sparc 266ifeq ($(ARCH),sparc32) 267 SRCARCH := sparc 268endif 269ifeq ($(ARCH),sparc64) 270 SRCARCH := sparc 271endif 272 273# Additional ARCH settings for sh 274ifeq ($(ARCH),sh64) 275 SRCARCH := sh 276endif 277 278# Additional ARCH settings for tile 279ifeq ($(ARCH),tilepro) 280 SRCARCH := tile 281endif 282ifeq ($(ARCH),tilegx) 283 SRCARCH := tile 284endif 285 286# Where to locate arch specific headers 287hdr-arch := $(SRCARCH) 288 289KCONFIG_CONFIG ?= .config 290export KCONFIG_CONFIG 291 292# SHELL used by kbuild 293CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 294 else if [ -x /bin/bash ]; then echo /bin/bash; \ 295 else echo sh; fi ; fi) 296 297HOSTCC = gcc 298HOSTCXX = g++ 299HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 300HOSTCXXFLAGS = -O2 301 302ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) 303HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ 304 -Wno-missing-field-initializers -fno-delete-null-pointer-checks 305endif 306 307# Decide whether to build built-in, modular, or both. 308# Normally, just do built-in. 309 310KBUILD_MODULES := 311KBUILD_BUILTIN := 1 312 313# If we have only "make modules", don't compile built-in objects. 314# When we're building modules with modversions, we need to consider 315# the built-in objects during the descend as well, in order to 316# make sure the checksums are up to date before we record them. 317 318ifeq ($(MAKECMDGOALS),modules) 319 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 320endif 321 322# If we have "make <whatever> modules", compile modules 323# in addition to whatever we do anyway. 324# Just "make" or "make all" shall build modules as well 325 326ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 327 KBUILD_MODULES := 1 328endif 329 330ifeq ($(MAKECMDGOALS),) 331 KBUILD_MODULES := 1 332endif 333 334export KBUILD_MODULES KBUILD_BUILTIN 335export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 336 337# We need some generic definitions (do not try to remake the file). 338scripts/Kbuild.include: ; 339include scripts/Kbuild.include 340 341# Make variables (CC, etc...) 342AS = $(CROSS_COMPILE)as 343LD = $(CROSS_COMPILE)ld 344CC = $(CROSS_COMPILE)gcc 345CPP = $(CC) -E 346AR = $(CROSS_COMPILE)ar 347NM = $(CROSS_COMPILE)nm 348STRIP = $(CROSS_COMPILE)strip 349OBJCOPY = $(CROSS_COMPILE)objcopy 350OBJDUMP = $(CROSS_COMPILE)objdump 351AWK = awk 352GENKSYMS = scripts/genksyms/genksyms 353INSTALLKERNEL := installkernel 354DEPMOD = /sbin/depmod 355PERL = perl 356PYTHON = python 357CHECK = sparse 358 359CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 360 -Wbitwise -Wno-return-void $(CF) 361NOSTDINC_FLAGS = 362CFLAGS_MODULE = 363AFLAGS_MODULE = 364LDFLAGS_MODULE = 365CFLAGS_KERNEL = 366AFLAGS_KERNEL = 367LDFLAGS_vmlinux = 368CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,) 369CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) 370 371 372# Use USERINCLUDE when you must reference the UAPI directories only. 373USERINCLUDE := \ 374 -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 375 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 376 -I$(srctree)/include/uapi \ 377 -I$(objtree)/include/generated/uapi \ 378 -include $(srctree)/include/linux/kconfig.h 379 380# Use LINUXINCLUDE when you must reference the include/ directory. 381# Needed to be compatible with the O= option 382LINUXINCLUDE := \ 383 -I$(srctree)/arch/$(hdr-arch)/include \ 384 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 385 -I$(objtree)/arch/$(hdr-arch)/include/generated \ 386 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 387 -I$(objtree)/include 388 389LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE)) 390 391KBUILD_CPPFLAGS := -D__KERNEL__ 392 393KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 394 -fno-strict-aliasing -fno-common \ 395 -Werror-implicit-function-declaration \ 396 -Wno-format-security \ 397 -std=gnu89 $(call cc-option,-fno-PIE) 398 399 400KBUILD_AFLAGS_KERNEL := 401KBUILD_CFLAGS_KERNEL := 402KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE) 403KBUILD_AFLAGS_MODULE := -DMODULE 404KBUILD_CFLAGS_MODULE := -DMODULE 405KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 406 407# Read KERNELRELEASE from include/config/kernel.release (if it exists) 408KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 409KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 410 411export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 412export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 413export CPP AR NM STRIP OBJCOPY OBJDUMP 414export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 415export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 416 417export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 418export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN 419export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 420export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 421export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 422export KBUILD_ARFLAGS 423 424# When compiling out-of-tree modules, put MODVERDIR in the module 425# tree rather than in the kernel tree. The kernel tree might 426# even be read-only. 427export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 428 429# Files to ignore in find ... statements 430 431export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 432 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 433 -prune -o 434export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 435 --exclude CVS --exclude .pc --exclude .hg --exclude .git 436 437# =========================================================================== 438# Rules shared between *config targets and build targets 439 440# Basic helpers built in scripts/ 441PHONY += scripts_basic 442scripts_basic: 443 $(Q)$(MAKE) $(build)=scripts/basic 444 $(Q)rm -f .tmp_quiet_recordmcount 445 446# To avoid any implicit rule to kick in, define an empty command. 447scripts/basic/%: scripts_basic ; 448 449PHONY += outputmakefile 450# outputmakefile generates a Makefile in the output directory, if using a 451# separate output directory. This allows convenient use of make in the 452# output directory. 453outputmakefile: 454ifneq ($(KBUILD_SRC),) 455 $(Q)ln -fsn $(srctree) source 456 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 457 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 458endif 459 460# Support for using generic headers in asm-generic 461PHONY += asm-generic 462asm-generic: 463 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 464 src=asm obj=arch/$(SRCARCH)/include/generated/asm 465 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 466 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 467 468# To make sure we do not include .config for any of the *config targets 469# catch them early, and hand them over to scripts/kconfig/Makefile 470# It is allowed to specify more targets when calling make, including 471# mixing *config targets and build targets. 472# For example 'make oldconfig all'. 473# Detect when mixed targets is specified, and make a second invocation 474# of make so .config is not included in this case either (for *config). 475 476version_h := include/generated/uapi/linux/version.h 477old_version_h := include/linux/version.h 478 479no-dot-config-targets := clean mrproper distclean \ 480 cscope gtags TAGS tags help% %docs check% coccicheck \ 481 $(version_h) headers_% archheaders archscripts \ 482 kernelversion %src-pkg 483 484config-targets := 0 485mixed-targets := 0 486dot-config := 1 487 488ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 489 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 490 dot-config := 0 491 endif 492endif 493 494ifeq ($(KBUILD_EXTMOD),) 495 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 496 config-targets := 1 497 ifneq ($(words $(MAKECMDGOALS)),1) 498 mixed-targets := 1 499 endif 500 endif 501endif 502# install and module_install need also be processed one by one 503ifneq ($(filter install,$(MAKECMDGOALS)),) 504 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 505 mixed-targets := 1 506 endif 507endif 508 509ifeq ($(mixed-targets),1) 510# =========================================================================== 511# We're called with mixed targets (*config and build targets). 512# Handle them one by one. 513 514PHONY += $(MAKECMDGOALS) __build_one_by_one 515 516$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 517 @: 518 519__build_one_by_one: 520 $(Q)set -e; \ 521 for i in $(MAKECMDGOALS); do \ 522 $(MAKE) -f $(srctree)/Makefile $$i; \ 523 done 524 525else 526ifeq ($(config-targets),1) 527# =========================================================================== 528# *config targets only - make sure prerequisites are updated, and descend 529# in scripts/kconfig to make the *config target 530 531# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 532# KBUILD_DEFCONFIG may point out an alternative default configuration 533# used for 'make defconfig' 534include arch/$(SRCARCH)/Makefile 535export KBUILD_DEFCONFIG KBUILD_KCONFIG 536 537config: scripts_basic outputmakefile FORCE 538 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 539 540%config: scripts_basic outputmakefile FORCE 541 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 542 543else 544# =========================================================================== 545# Build targets only - this includes vmlinux, arch specific targets, clean 546# targets and others. In general all targets except *config targets. 547 548ifeq ($(KBUILD_EXTMOD),) 549# Additional helpers built in scripts/ 550# Carefully list dependencies so we do not try to build scripts twice 551# in parallel 552PHONY += scripts 553scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ 554 asm-generic gcc-plugins 555 $(Q)$(MAKE) $(build)=$(@) 556 557# Objects we will link into vmlinux / subdirs we need to visit 558init-y := init/ 559drivers-y := drivers/ sound/ firmware/ 560net-y := net/ 561libs-y := lib/ 562core-y := usr/ 563virt-y := virt/ 564endif # KBUILD_EXTMOD 565 566ifeq ($(dot-config),1) 567# Read in config 568-include include/config/auto.conf 569 570ifeq ($(KBUILD_EXTMOD),) 571# Read in dependencies to all Kconfig* files, make sure to run 572# oldconfig if changes are detected. 573-include include/config/auto.conf.cmd 574 575# To avoid any implicit rule to kick in, define an empty command 576$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 577 578# If .config is newer than include/config/auto.conf, someone tinkered 579# with it and forgot to run make oldconfig. 580# if auto.conf.cmd is missing then we are probably in a cleaned tree so 581# we execute the config step to be sure to catch updated Kconfig files 582include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 583 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 584else 585# external modules needs include/generated/autoconf.h and include/config/auto.conf 586# but do not care if they are up-to-date. Use auto.conf to trigger the test 587PHONY += include/config/auto.conf 588 589include/config/auto.conf: 590 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 591 echo >&2; \ 592 echo >&2 " ERROR: Kernel configuration is invalid."; \ 593 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 594 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 595 echo >&2 ; \ 596 /bin/false) 597 598endif # KBUILD_EXTMOD 599 600else 601# Dummy target needed, because used as prerequisite 602include/config/auto.conf: ; 603endif # $(dot-config) 604 605# For the kernel to actually contain only the needed exported symbols, 606# we have to build modules as well to determine what those symbols are. 607# (this can be evaluated only once include/config/auto.conf has been included) 608ifdef CONFIG_TRIM_UNUSED_KSYMS 609 KBUILD_MODULES := 1 610endif 611 612# The all: target is the default when no target is given on the 613# command line. 614# This allow a user to issue only 'make' to build a kernel including modules 615# Defaults to vmlinux, but the arch makefile usually adds further targets 616all: vmlinux 617 618# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 619# values of the respective KBUILD_* variables 620ARCH_CPPFLAGS := 621ARCH_AFLAGS := 622ARCH_CFLAGS := 623include arch/$(SRCARCH)/Makefile 624 625KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 626KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 627 628ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 629KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) 630KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) 631else 632ifdef CONFIG_PROFILE_ALL_BRANCHES 633KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) 634else 635KBUILD_CFLAGS += -O2 636endif 637endif 638 639KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 640 $(call cc-disable-warning,maybe-uninitialized,)) 641 642# Tell gcc to never replace conditional load with a non-conditional one 643KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 644 645# check for 'asm goto' 646ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) 647 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 648 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 649endif 650 651include scripts/Makefile.gcc-plugins 652 653ifdef CONFIG_READABLE_ASM 654# Disable optimizations that make assembler listings hard to read. 655# reorder blocks reorders the control in the function 656# ipa clone creates specialized cloned functions 657# partial inlining inlines only parts of functions 658KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 659 $(call cc-option,-fno-ipa-cp-clone,) \ 660 $(call cc-option,-fno-partial-inlining) 661endif 662 663ifneq ($(CONFIG_FRAME_WARN),0) 664KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 665endif 666 667# This selects the stack protector compiler flag. Testing it is delayed 668# until after .config has been reprocessed, in the prepare-compiler-check 669# target. 670ifdef CONFIG_CC_STACKPROTECTOR_REGULAR 671 stackp-flag := -fstack-protector 672 stackp-name := REGULAR 673else 674ifdef CONFIG_CC_STACKPROTECTOR_STRONG 675 stackp-flag := -fstack-protector-strong 676 stackp-name := STRONG 677else 678 # Force off for distro compilers that enable stack protector by default. 679 stackp-flag := $(call cc-option, -fno-stack-protector) 680endif 681endif 682# Find arch-specific stack protector compiler sanity-checking script. 683ifdef CONFIG_CC_STACKPROTECTOR 684 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh 685 stackp-check := $(wildcard $(stackp-path)) 686endif 687KBUILD_CFLAGS += $(stackp-flag) 688 689ifeq ($(cc-name),clang) 690ifneq ($(CROSS_COMPILE),) 691CLANG_TARGET := -target $(notdir $(CROSS_COMPILE:%-=%)) 692GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..) 693endif 694ifneq ($(GCC_TOOLCHAIN),) 695CLANG_GCC_TC := -gcc-toolchain $(GCC_TOOLCHAIN) 696endif 697KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) 698KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) 699KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 700KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 701KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 702KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 703# Quiet clang warning: comparison of unsigned expression < 0 is always false 704KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 705# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 706# source of a reference will be _MergedGlobals and not on of the whitelisted names. 707# See modpost pattern 2 708KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 709KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 710KBUILD_CFLAGS += $(call cc-option, -no-integrated-as) 711KBUILD_AFLAGS += $(call cc-option, -no-integrated-as) 712else 713 714# These warnings generated too much noise in a regular build. 715# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 716KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 717KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 718endif 719 720ifdef CONFIG_FRAME_POINTER 721KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 722else 723# Some targets (ARM with Thumb2, for example), can't be built with frame 724# pointers. For those, we don't have FUNCTION_TRACER automatically 725# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 726# incompatible with -fomit-frame-pointer with current GCC, so we don't use 727# -fomit-frame-pointer with FUNCTION_TRACER. 728ifndef CONFIG_FUNCTION_TRACER 729KBUILD_CFLAGS += -fomit-frame-pointer 730endif 731endif 732 733KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 734 735ifdef CONFIG_DEBUG_INFO 736ifdef CONFIG_DEBUG_INFO_SPLIT 737KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 738else 739KBUILD_CFLAGS += -g 740endif 741KBUILD_AFLAGS += -Wa,-gdwarf-2 742endif 743ifdef CONFIG_DEBUG_INFO_DWARF4 744KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 745endif 746 747ifdef CONFIG_DEBUG_INFO_REDUCED 748KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 749 $(call cc-option,-fno-var-tracking) 750endif 751 752ifdef CONFIG_FUNCTION_TRACER 753ifndef CC_FLAGS_FTRACE 754CC_FLAGS_FTRACE := -pg 755endif 756export CC_FLAGS_FTRACE 757ifdef CONFIG_HAVE_FENTRY 758CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 759endif 760KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 761KBUILD_AFLAGS += $(CC_USING_FENTRY) 762ifdef CONFIG_DYNAMIC_FTRACE 763 ifdef CONFIG_HAVE_C_RECORDMCOUNT 764 BUILD_C_RECORDMCOUNT := y 765 export BUILD_C_RECORDMCOUNT 766 endif 767endif 768endif 769 770# We trigger additional mismatches with less inlining 771ifdef CONFIG_DEBUG_SECTION_MISMATCH 772KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 773endif 774 775ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 776KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) 777KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) 778endif 779 780# arch Makefile may override CC so keep this after arch Makefile is included 781NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 782CHECKFLAGS += $(NOSTDINC_FLAGS) 783 784# warn about C99 declaration after statement 785KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 786 787# disable pointer signed / unsigned warnings in gcc 4.0 788KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 789 790# disable invalid "can't wrap" optimizations for signed / pointers 791KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 792 793# conserve stack if available 794KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 795 796# disallow errors like 'EXPORT_GPL(foo);' with missing header 797KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 798 799# require functions to have arguments in prototypes, not empty 'int foo()' 800KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 801 802# Prohibit date/time macros, which would make the build non-deterministic 803KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 804 805# enforce correct pointer usage 806KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 807 808# Require designated initializers for all marked structures 809KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 810 811# use the deterministic mode of AR if available 812KBUILD_ARFLAGS := $(call ar-option,D) 813 814include scripts/Makefile.kasan 815include scripts/Makefile.extrawarn 816include scripts/Makefile.ubsan 817 818# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 819# last assignments 820KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 821KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 822KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 823 824# Use --build-id when available. 825LDFLAGS_BUILD_ID := $(patsubst -Wl$(comma)%,%,\ 826 $(call cc-ldoption, -Wl$(comma)--build-id,)) 827KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 828LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 829 830ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 831LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) 832endif 833 834ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 835LDFLAGS_vmlinux += $(call ld-option, -X,) 836endif 837 838# Default kernel image to build when no specific target is given. 839# KBUILD_IMAGE may be overruled on the command line or 840# set in the environment 841# Also any assignments in arch/$(ARCH)/Makefile take precedence over 842# this default value 843export KBUILD_IMAGE ?= vmlinux 844 845# 846# INSTALL_PATH specifies where to place the updated kernel and system map 847# images. Default is /boot, but you can set it to other values 848export INSTALL_PATH ?= /boot 849 850# 851# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 852# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 853# an argument if needed. Otherwise it defaults to the kernel install path 854# 855export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 856 857# 858# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 859# relocations required by build roots. This is not defined in the 860# makefile but the argument can be passed to make if needed. 861# 862 863MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 864export MODLIB 865 866# 867# INSTALL_MOD_STRIP, if defined, will cause modules to be 868# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 869# the default option --strip-debug will be used. Otherwise, 870# INSTALL_MOD_STRIP value will be used as the options to the strip command. 871 872ifdef INSTALL_MOD_STRIP 873ifeq ($(INSTALL_MOD_STRIP),1) 874mod_strip_cmd = $(STRIP) --strip-debug 875else 876mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 877endif # INSTALL_MOD_STRIP=1 878else 879mod_strip_cmd = true 880endif # INSTALL_MOD_STRIP 881export mod_strip_cmd 882 883# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 884# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 885# or CONFIG_MODULE_COMPRESS_XZ. 886 887mod_compress_cmd = true 888ifdef CONFIG_MODULE_COMPRESS 889 ifdef CONFIG_MODULE_COMPRESS_GZIP 890 mod_compress_cmd = gzip -n -f 891 endif # CONFIG_MODULE_COMPRESS_GZIP 892 ifdef CONFIG_MODULE_COMPRESS_XZ 893 mod_compress_cmd = xz -f 894 endif # CONFIG_MODULE_COMPRESS_XZ 895endif # CONFIG_MODULE_COMPRESS 896export mod_compress_cmd 897 898# Select initial ramdisk compression format, default is gzip(1). 899# This shall be used by the dracut(8) tool while creating an initramfs image. 900# 901INITRD_COMPRESS-y := gzip 902INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 903INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 904INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 905INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 906INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 907# do not export INITRD_COMPRESS, since we didn't actually 908# choose a sane default compression above. 909# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 910 911ifdef CONFIG_MODULE_SIG_ALL 912$(eval $(call config_filename,MODULE_SIG_KEY)) 913 914mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 915else 916mod_sign_cmd = true 917endif 918export mod_sign_cmd 919 920ifdef CONFIG_STACK_VALIDATION 921 has_libelf := $(call try-run,\ 922 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 923 ifeq ($(has_libelf),1) 924 objtool_target := tools/objtool FORCE 925 else 926 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 927 SKIP_STACK_VALIDATION := 1 928 export SKIP_STACK_VALIDATION 929 endif 930endif 931 932 933ifeq ($(KBUILD_EXTMOD),) 934core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 935 936vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 937 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 938 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 939 940vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 941 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 942 943init-y := $(patsubst %/, %/built-in.o, $(init-y)) 944core-y := $(patsubst %/, %/built-in.o, $(core-y)) 945drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 946net-y := $(patsubst %/, %/built-in.o, $(net-y)) 947libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 948libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 949libs-y := $(libs-y1) $(libs-y2) 950virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) 951 952# Externally visible symbols (used by link-vmlinux.sh) 953export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 954export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y) 955export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 956export LDFLAGS_vmlinux 957# used by scripts/pacmage/Makefile 958export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 959 960vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 961 962# Include targets which we want to execute sequentially if the rest of the 963# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be 964# evaluated more than once. 965PHONY += vmlinux_prereq 966vmlinux_prereq: $(vmlinux-deps) FORCE 967ifdef CONFIG_HEADERS_CHECK 968 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 969endif 970ifdef CONFIG_GDB_SCRIPTS 971 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 972endif 973ifdef CONFIG_TRIM_UNUSED_KSYMS 974 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 975 "$(MAKE) -f $(srctree)/Makefile vmlinux" 976endif 977 978# standalone target for easier testing 979include/generated/autoksyms.h: FORCE 980 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 981 982ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 983 984# Final link of vmlinux with optional arch pass after final link 985 cmd_link-vmlinux = \ 986 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ 987 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 988 989vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 990 +$(call if_changed,link-vmlinux) 991 992# Build samples along the rest of the kernel 993ifdef CONFIG_SAMPLES 994vmlinux-dirs += samples 995endif 996 997# The actual objects are generated when descending, 998# make sure no implicit rule kicks in 999$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1000 1001# Handle descending into subdirectories listed in $(vmlinux-dirs) 1002# Preset locale variables to speed up the build process. Limit locale 1003# tweaks to this spot to avoid wrong language settings when running 1004# make menuconfig etc. 1005# Error messages still appears in the original language 1006 1007PHONY += $(vmlinux-dirs) 1008$(vmlinux-dirs): prepare scripts 1009 $(Q)$(MAKE) $(build)=$@ 1010 1011define filechk_kernel.release 1012 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1013endef 1014 1015# Store (new) KERNELRELEASE string in include/config/kernel.release 1016include/config/kernel.release: include/config/auto.conf FORCE 1017 $(call filechk,kernel.release) 1018 1019 1020# Things we need to do before we recursively start building the kernel 1021# or the modules are listed in "prepare". 1022# A multi level approach is used. prepareN is processed before prepareN-1. 1023# archprepare is used in arch Makefiles and when processed asm symlink, 1024# version.h and scripts_basic is processed / created. 1025 1026# Listed in dependency order 1027PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 1028 1029# prepare3 is used to check if we are building in a separate output directory, 1030# and if so do: 1031# 1) Check that make has not been executed in the kernel src $(srctree) 1032prepare3: include/config/kernel.release 1033ifneq ($(KBUILD_SRC),) 1034 @$(kecho) ' Using $(srctree) as source for kernel' 1035 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1036 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1037 echo >&2 " in the '$(srctree)' directory.";\ 1038 /bin/false; \ 1039 fi; 1040endif 1041 1042# prepare2 creates a makefile if using a separate output directory. 1043# From this point forward, .config has been reprocessed, so any rules 1044# that need to depend on updated CONFIG_* values can be checked here. 1045prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic 1046 1047prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 1048 include/config/auto.conf 1049 $(cmd_crmodverdir) 1050 1051archprepare: archheaders archscripts prepare1 scripts_basic 1052 1053prepare0: archprepare gcc-plugins 1054 $(Q)$(MAKE) $(build)=. 1055 1056# All the preparing.. 1057prepare: prepare0 prepare-objtool 1058 1059PHONY += prepare-objtool 1060prepare-objtool: $(objtool_target) 1061 1062# Check for CONFIG flags that require compiler support. Abort the build 1063# after .config has been processed, but before the kernel build starts. 1064# 1065# For security-sensitive CONFIG options, we don't want to fallback and/or 1066# silently change which compiler flags will be used, since that leads to 1067# producing kernels with different security feature characteristics 1068# depending on the compiler used. (For example, "But I selected 1069# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 1070PHONY += prepare-compiler-check 1071prepare-compiler-check: FORCE 1072# Make sure compiler supports requested stack protector flag. 1073ifdef stackp-name 1074 ifeq ($(call cc-option, $(stackp-flag)),) 1075 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1076 $(stackp-flag) not supported by compiler >&2 && exit 1 1077 endif 1078endif 1079# Make sure compiler does not have buggy stack-protector support. 1080ifdef stackp-check 1081 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) 1082 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1083 $(stackp-flag) available but compiler is broken >&2 && exit 1 1084 endif 1085endif 1086 @: 1087 1088# Generate some files 1089# --------------------------------------------------------------------------- 1090 1091# KERNELRELEASE can change from a few different places, meaning version.h 1092# needs to be updated, so this check is forced on all builds 1093 1094uts_len := 64 1095define filechk_utsrelease.h 1096 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1097 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1098 exit 1; \ 1099 fi; \ 1100 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1101endef 1102 1103define filechk_version.h 1104 (echo \#define LINUX_VERSION_CODE $(shell \ 1105 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1106 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1107endef 1108 1109$(version_h): $(srctree)/Makefile FORCE 1110 $(call filechk,version.h) 1111 $(Q)rm -f $(old_version_h) 1112 1113include/generated/utsrelease.h: include/config/kernel.release FORCE 1114 $(call filechk,utsrelease.h) 1115 1116PHONY += headerdep 1117headerdep: 1118 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1119 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1120 1121# --------------------------------------------------------------------------- 1122# Firmware install 1123INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1124export INSTALL_FW_PATH 1125 1126PHONY += firmware_install 1127firmware_install: 1128 @mkdir -p $(objtree)/firmware 1129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1130 1131# --------------------------------------------------------------------------- 1132# Kernel headers 1133 1134#Default location for installed headers 1135export INSTALL_HDR_PATH = $(objtree)/usr 1136 1137# If we do an all arch process set dst to asm-$(hdr-arch) 1138hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(hdr-arch), dst=include) 1139 1140PHONY += archheaders 1141archheaders: 1142 1143PHONY += archscripts 1144archscripts: 1145 1146PHONY += __headers 1147__headers: $(version_h) scripts_basic asm-generic archheaders archscripts 1148 $(Q)$(MAKE) $(build)=scripts build_unifdef 1149 1150PHONY += headers_install_all 1151headers_install_all: 1152 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1153 1154PHONY += headers_install 1155headers_install: __headers 1156 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 1157 $(error Headers not exportable for the $(SRCARCH) architecture)) 1158 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1159 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) 1160 1161PHONY += headers_check_all 1162headers_check_all: headers_install_all 1163 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1164 1165PHONY += headers_check 1166headers_check: headers_install 1167 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1168 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) HDRCHECK=1 1169 1170# --------------------------------------------------------------------------- 1171# Kernel selftest 1172 1173PHONY += kselftest 1174kselftest: 1175 $(Q)$(MAKE) -C tools/testing/selftests run_tests 1176 1177kselftest-clean: 1178 $(Q)$(MAKE) -C tools/testing/selftests clean 1179 1180PHONY += kselftest-merge 1181kselftest-merge: 1182 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1183 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1184 -m $(objtree)/.config \ 1185 $(srctree)/tools/testing/selftests/*/config 1186 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1187 1188# --------------------------------------------------------------------------- 1189# Modules 1190 1191ifdef CONFIG_MODULES 1192 1193# By default, build modules as well 1194 1195all: modules 1196 1197# Build modules 1198# 1199# A module can be listed more than once in obj-m resulting in 1200# duplicate lines in modules.order files. Those are removed 1201# using awk while concatenating to the final file. 1202 1203PHONY += modules 1204modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1205 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1206 @$(kecho) ' Building modules, stage 2.'; 1207 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1208 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1209 1210modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1211 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1212 1213%/modules.builtin: include/config/auto.conf 1214 $(Q)$(MAKE) $(modbuiltin)=$* 1215 1216 1217# Target to prepare building external modules 1218PHONY += modules_prepare 1219modules_prepare: prepare scripts 1220 1221# Target to install modules 1222PHONY += modules_install 1223modules_install: _modinst_ _modinst_post 1224 1225PHONY += _modinst_ 1226_modinst_: 1227 @rm -rf $(MODLIB)/kernel 1228 @rm -f $(MODLIB)/source 1229 @mkdir -p $(MODLIB)/kernel 1230 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 1231 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1232 rm -f $(MODLIB)/build ; \ 1233 ln -s $(CURDIR) $(MODLIB)/build ; \ 1234 fi 1235 @cp -f $(objtree)/modules.order $(MODLIB)/ 1236 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1237 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1238 1239# This depmod is only for convenience to give the initial 1240# boot a modules.dep even before / is mounted read-write. However the 1241# boot script depmod is the master version. 1242PHONY += _modinst_post 1243_modinst_post: _modinst_ 1244 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1245 $(call cmd,depmod) 1246 1247ifeq ($(CONFIG_MODULE_SIG), y) 1248PHONY += modules_sign 1249modules_sign: 1250 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1251endif 1252 1253else # CONFIG_MODULES 1254 1255# Modules not configured 1256# --------------------------------------------------------------------------- 1257 1258PHONY += modules modules_install 1259modules modules_install: 1260 @echo >&2 1261 @echo >&2 "The present kernel configuration has modules disabled." 1262 @echo >&2 "Type 'make config' and enable loadable module support." 1263 @echo >&2 "Then build a kernel with module support enabled." 1264 @echo >&2 1265 @exit 1 1266 1267endif # CONFIG_MODULES 1268 1269### 1270# Cleaning is done on three levels. 1271# make clean Delete most generated files 1272# Leave enough to build external modules 1273# make mrproper Delete the current configuration, and all generated files 1274# make distclean Remove editor backup files, patch leftover files and the like 1275 1276# Directories & files removed with 'make clean' 1277CLEAN_DIRS += $(MODVERDIR) 1278 1279# Directories & files removed with 'make mrproper' 1280MRPROPER_DIRS += include/config usr/include include/generated \ 1281 arch/*/include/generated .tmp_objdiff 1282MRPROPER_FILES += .config .config.old .version .old_version \ 1283 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1284 signing_key.pem signing_key.priv signing_key.x509 \ 1285 x509.genkey extra_certificates signing_key.x509.keyid \ 1286 signing_key.x509.signer vmlinux-gdb.py 1287 1288# clean - Delete most, but leave enough to build external modules 1289# 1290clean: rm-dirs := $(CLEAN_DIRS) 1291clean: rm-files := $(CLEAN_FILES) 1292clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1293 1294PHONY += $(clean-dirs) clean archclean vmlinuxclean 1295$(clean-dirs): 1296 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1297 1298vmlinuxclean: 1299 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1300 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1301 1302clean: archclean vmlinuxclean 1303 1304# mrproper - Delete all generated files, including .config 1305# 1306mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1307mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1308mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1309 1310PHONY += $(mrproper-dirs) mrproper archmrproper 1311$(mrproper-dirs): 1312 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1313 1314mrproper: clean archmrproper $(mrproper-dirs) 1315 $(call cmd,rmdirs) 1316 $(call cmd,rmfiles) 1317 1318# distclean 1319# 1320PHONY += distclean 1321 1322distclean: mrproper 1323 @find $(srctree) $(RCS_FIND_IGNORE) \ 1324 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1325 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1326 -o -name 'core' \) \ 1327 -type f -print | xargs rm -f 1328 1329 1330# Packaging of the kernel to various formats 1331# --------------------------------------------------------------------------- 1332# rpm target kept for backward compatibility 1333package-dir := scripts/package 1334 1335%src-pkg: FORCE 1336 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1337%pkg: include/config/kernel.release FORCE 1338 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1339rpm: include/config/kernel.release FORCE 1340 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1341 1342 1343# Brief documentation of the typical targets used 1344# --------------------------------------------------------------------------- 1345 1346boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1347boards := $(sort $(notdir $(boards))) 1348board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1349board-dirs := $(sort $(notdir $(board-dirs:/=))) 1350 1351PHONY += help 1352help: 1353 @echo 'Cleaning targets:' 1354 @echo ' clean - Remove most generated files but keep the config and' 1355 @echo ' enough build support to build external modules' 1356 @echo ' mrproper - Remove all generated files + config + various backup files' 1357 @echo ' distclean - mrproper + remove editor backup and patch files' 1358 @echo '' 1359 @echo 'Configuration targets:' 1360 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1361 @echo '' 1362 @echo 'Other generic targets:' 1363 @echo ' all - Build all targets marked with [*]' 1364 @echo '* vmlinux - Build the bare kernel' 1365 @echo '* modules - Build all modules' 1366 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1367 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1368 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1369 @echo ' dir/ - Build all files in dir and below' 1370 @echo ' dir/file.[ois] - Build specified target only' 1371 @echo ' dir/file.ll - Build the LLVM assembly file' 1372 @echo ' (requires compiler support for LLVM assembly generation)' 1373 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1374 @echo ' (requires a recent binutils and recent build (System.map))' 1375 @echo ' dir/file.ko - Build module including final link' 1376 @echo ' modules_prepare - Set up for building external modules' 1377 @echo ' tags/TAGS - Generate tags file for editors' 1378 @echo ' cscope - Generate cscope index' 1379 @echo ' gtags - Generate GNU GLOBAL index' 1380 @echo ' kernelrelease - Output the release version string (use with make -s)' 1381 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1382 @echo ' image_name - Output the image name (use with make -s)' 1383 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1384 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1385 echo '' 1386 @echo 'Static analysers:' 1387 @echo ' checkstack - Generate a list of stack hogs' 1388 @echo ' namespacecheck - Name space analysis on compiled kernel' 1389 @echo ' versioncheck - Sanity check on version.h usage' 1390 @echo ' includecheck - Check for duplicate included header files' 1391 @echo ' export_report - List the usages of all exported symbols' 1392 @echo ' headers_check - Sanity check on exported headers' 1393 @echo ' headerdep - Detect inclusion cycles in headers' 1394 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1395 @echo '' 1396 @echo 'Kernel selftest:' 1397 @echo ' kselftest - Build and run kernel selftest (run as root)' 1398 @echo ' Build, install, and boot kernel before' 1399 @echo ' running kselftest on it' 1400 @echo ' kselftest-clean - Remove all generated kselftest files' 1401 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' 1402 @echo ' .config.' 1403 @echo '' 1404 @echo 'Userspace tools targets:' 1405 @echo ' use "make tools/help"' 1406 @echo ' or "cd tools; make help"' 1407 @echo '' 1408 @echo 'Kernel packaging:' 1409 @$(MAKE) $(build)=$(package-dir) help 1410 @echo '' 1411 @echo 'Documentation targets:' 1412 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp 1413 @echo '' 1414 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1415 @echo '' 1416 @echo 'Architecture specific targets ($(SRCARCH)):' 1417 @$(if $(archhelp),$(archhelp),\ 1418 echo ' No architecture specific help defined for $(SRCARCH)') 1419 @echo '' 1420 @$(if $(boards), \ 1421 $(foreach b, $(boards), \ 1422 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1423 echo '') 1424 @$(if $(board-dirs), \ 1425 $(foreach b, $(board-dirs), \ 1426 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1427 printf " %-16s - Show all of the above\\n" help-boards; \ 1428 echo '') 1429 1430 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1431 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1432 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1433 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1434 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1435 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1436 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1437 @echo ' 1: warnings which may be relevant and do not occur too often' 1438 @echo ' 2: warnings which occur quite often but may still be relevant' 1439 @echo ' 3: more obscure warnings, can most likely be ignored' 1440 @echo ' Multiple levels can be combined with W=12 or W=123' 1441 @echo '' 1442 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1443 @echo 'For further info see the ./README file' 1444 1445 1446help-board-dirs := $(addprefix help-,$(board-dirs)) 1447 1448help-boards: $(help-board-dirs) 1449 1450boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1451 1452$(help-board-dirs): help-%: 1453 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1454 @$(if $(boards-per-dir), \ 1455 $(foreach b, $(boards-per-dir), \ 1456 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1457 echo '') 1458 1459 1460# Documentation targets 1461# --------------------------------------------------------------------------- 1462DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs linkcheckdocs 1463PHONY += $(DOC_TARGETS) 1464$(DOC_TARGETS): scripts_basic FORCE 1465 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype 1466 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ 1467 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1468 1469else # KBUILD_EXTMOD 1470 1471### 1472# External module support. 1473# When building external modules the kernel used as basis is considered 1474# read-only, and no consistency checks are made and the make 1475# system is not used on the basis kernel. If updates are required 1476# in the basis kernel ordinary make commands (without M=...) must 1477# be used. 1478# 1479# The following are the only valid targets when building external 1480# modules. 1481# make M=dir clean Delete all automatically generated files 1482# make M=dir modules Make all modules in specified dir 1483# make M=dir Same as 'make M=dir modules' 1484# make M=dir modules_install 1485# Install the modules built in the module directory 1486# Assumes install directory is already created 1487 1488# We are always building modules 1489KBUILD_MODULES := 1 1490PHONY += crmodverdir 1491crmodverdir: 1492 $(cmd_crmodverdir) 1493 1494PHONY += $(objtree)/Module.symvers 1495$(objtree)/Module.symvers: 1496 @test -e $(objtree)/Module.symvers || ( \ 1497 echo; \ 1498 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1499 echo " is missing; modules will have no dependencies and modversions."; \ 1500 echo ) 1501 1502module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1503PHONY += $(module-dirs) modules 1504$(module-dirs): crmodverdir $(objtree)/Module.symvers 1505 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1506 1507modules: $(module-dirs) 1508 @$(kecho) ' Building modules, stage 2.'; 1509 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1510 1511PHONY += modules_install 1512modules_install: _emodinst_ _emodinst_post 1513 1514install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1515PHONY += _emodinst_ 1516_emodinst_: 1517 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1518 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1519 1520PHONY += _emodinst_post 1521_emodinst_post: _emodinst_ 1522 $(call cmd,depmod) 1523 1524clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1525 1526PHONY += $(clean-dirs) clean 1527$(clean-dirs): 1528 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1529 1530clean: rm-dirs := $(MODVERDIR) 1531clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1532 1533PHONY += help 1534help: 1535 @echo ' Building external modules.' 1536 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1537 @echo '' 1538 @echo ' modules - default target, build the module(s)' 1539 @echo ' modules_install - install the module' 1540 @echo ' clean - remove generated files in module directory only' 1541 @echo '' 1542 1543# Dummies... 1544PHONY += prepare scripts 1545prepare: ; 1546scripts: ; 1547endif # KBUILD_EXTMOD 1548 1549clean: $(clean-dirs) 1550 $(call cmd,rmdirs) 1551 $(call cmd,rmfiles) 1552 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1553 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1554 -o -name '*.ko.*' \ 1555 -o -name '*.dwo' \ 1556 -o -name '*.su' \ 1557 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1558 -o -name '*.symtypes' -o -name 'modules.order' \ 1559 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1560 -o -name '*.c.[012]*.*' \ 1561 -o -name '*.ll' \ 1562 -o -name '*.gcno' \) -type f -print | xargs rm -f 1563 1564# Generate tags for editors 1565# --------------------------------------------------------------------------- 1566quiet_cmd_tags = GEN $@ 1567 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1568 1569tags TAGS cscope gtags: FORCE 1570 $(call cmd,tags) 1571 1572# Scripts to check various things for consistency 1573# --------------------------------------------------------------------------- 1574 1575PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1576 1577includecheck: 1578 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1579 -name '*.[hcS]' -type f -print | sort \ 1580 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1581 1582versioncheck: 1583 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1584 -name '*.[hcS]' -type f -print | sort \ 1585 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1586 1587coccicheck: 1588 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1589 1590namespacecheck: 1591 $(PERL) $(srctree)/scripts/namespace.pl 1592 1593export_report: 1594 $(PERL) $(srctree)/scripts/export_report.pl 1595 1596endif #ifeq ($(config-targets),1) 1597endif #ifeq ($(mixed-targets),1) 1598 1599PHONY += checkstack kernelrelease kernelversion image_name 1600 1601# UML needs a little special treatment here. It wants to use the host 1602# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1603# else wants $(ARCH), including people doing cross-builds, which means 1604# that $(SUBARCH) doesn't work here. 1605ifeq ($(ARCH), um) 1606CHECKSTACK_ARCH := $(SUBARCH) 1607else 1608CHECKSTACK_ARCH := $(ARCH) 1609endif 1610checkstack: 1611 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1612 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1613 1614kernelrelease: 1615 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1616 1617kernelversion: 1618 @echo $(KERNELVERSION) 1619 1620image_name: 1621 @echo $(KBUILD_IMAGE) 1622 1623# Clear a bunch of variables before executing the submake 1624tools/: FORCE 1625 $(Q)mkdir -p $(objtree)/tools 1626 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ 1627 1628tools/%: FORCE 1629 $(Q)mkdir -p $(objtree)/tools 1630 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* 1631 1632# Single targets 1633# --------------------------------------------------------------------------- 1634# Single targets are compatible with: 1635# - build with mixed source and output 1636# - build with separate output dir 'make O=...' 1637# - external modules 1638# 1639# target-dir => where to store outputfile 1640# build-dir => directory in kernel source tree to use 1641 1642ifeq ($(KBUILD_EXTMOD),) 1643 build-dir = $(patsubst %/,%,$(dir $@)) 1644 target-dir = $(dir $@) 1645else 1646 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1647 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1648 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1649endif 1650 1651%.s: %.c prepare scripts FORCE 1652 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1653%.i: %.c prepare scripts FORCE 1654 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1655%.o: %.c prepare scripts FORCE 1656 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1657%.lst: %.c prepare scripts FORCE 1658 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1659%.s: %.S prepare scripts FORCE 1660 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1661%.o: %.S prepare scripts FORCE 1662 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1663%.symtypes: %.c prepare scripts FORCE 1664 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1665%.ll: %.c prepare scripts FORCE 1666 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1667 1668# Modules 1669/: prepare scripts FORCE 1670 $(cmd_crmodverdir) 1671 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1672 $(build)=$(build-dir) 1673# Make sure the latest headers are built for Documentation 1674Documentation/ samples/: headers_install 1675%/: prepare scripts FORCE 1676 $(cmd_crmodverdir) 1677 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1678 $(build)=$(build-dir) 1679%.ko: prepare scripts FORCE 1680 $(cmd_crmodverdir) 1681 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1682 $(build)=$(build-dir) $(@:.ko=.o) 1683 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1684 1685# FIXME Should go into a make.lib or something 1686# =========================================================================== 1687 1688quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1689 cmd_rmdirs = rm -rf $(rm-dirs) 1690 1691quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1692 cmd_rmfiles = rm -f $(rm-files) 1693 1694# Run depmod only if we have System.map and depmod is executable 1695quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1696 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1697 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 1698 1699# Create temporary dir for module support files 1700# clean it up only when building all modules 1701cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1702 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1703 1704# read all saved command lines 1705 1706targets := $(wildcard $(sort $(targets))) 1707cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1708 1709ifneq ($(cmd_files),) 1710 $(cmd_files): ; # Do not try to update included dependency files 1711 include $(cmd_files) 1712endif 1713 1714endif # skip-makefile 1715 1716PHONY += FORCE 1717FORCE: 1718 1719# Declare the contents of the .PHONY variable as phony. We keep that 1720# information in a variable so we can use it in if_changed and friends. 1721.PHONY: $(PHONY) 1722